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1. 发明申请

US20050151586A1 Power amplifier 失效
标题翻译：功率放大器
公开(公告)号：US20050151586A1
公开(公告)日：2005-07-14
申请号：US10499624
申请日：2002-12-19
申请人： Giuseppe Grillo , Pepijn Willebrord Van De Ven
发明人： Giuseppe Grillo , Pepijn Willebrord Van De Ven
IPC分类号： H03F3/24 , H03F1/02 , H03F1/32 , H03G3/20
CPC分类号： H03F1/0277 , H03F1/0222
摘要： The present invention relates to a power amplifier being preferably applied in mobile communication devices andusing an envelope tracking technique. It is the object of the invention to improve a power amplifier with respect to its efficiency by simultaneously enabling an adaptation of the supply voltage for the unit 110 to fast variations of an envelope signal. This object is achieved by providing a second DC/DC converter 140 for generating a variety of n+1 voltage levels and n threshold values both in response to a received power control signal representing a required output power of the RF output signal and by a first DC/DC converter 130 to select one of said n+1 voltage levels as the supply voltage for said unit 110 in response to the result of a comparison between the envelope signaland said n threshold values.
摘要翻译：本发明涉及功率放大器，其优选地应用于移动通信设备中并且使用包络跟踪技术。本发明的目的是通过同时使单元110的电源电压适应于包络信号的快速变化来改善功率放大器的效率。该目的通过提供第二DC / DC转换器140来实现，该第二DC / DC转换器140用于响应于表示RF输出信号的所需输出功率的接收功率控制信号和第一 DC / DC转换器130响应于包络信号和所述n个阈值之间的比较的结果，选择所述n + 1个电压电平之一作为所述单元110的电源电压。

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